Pitman.



B. J. BOUWMEESTER.

PITMAN.

APPLICATION FILED JUNE 1?. 191a.

Patented Jan. 21, 1919.

5:131- iFIEiSEI- INVENTOR. Ber/1a mi din/7n IBouw newfer BY /6%wATTORNEYS.

Ti. WWI 1 ITNESSES :7 W

. arnssrnn, a

nEnNAnn JOHN an sraansratrnnr OFFICE,

BOUWMEESTFR, OF GRAND RAPIDS, MICHIGAN, ASSIGNOR T0 BISSELL CARPETSWEEPER CO.', 01 GRAND RAPIDS, MICHIGAN.

PI'IKEMAN.

To all whom it may concern:

Be it known that I, BERNARD JOHN Beowcitizen of the United States,residing at State of Michigan, have invented certain new and usefulImprovements in Pitmen, of which the following is a specification.

This invention relates to improvements in pitmen.

My improved pitman is especially designed by me for use in carpetsweepers or vacuum cleaners such as shown in my Letters Patent No.1,231,696, issued July 3, 1917, and I have illustrated the same asembodied in practice in astr'ucture of that type. My improvements are,however, advantageous for use in certain other relations.

The main objectof this invention is to provide animprov'ed 'pitnianwhich is selflubricating and self-alining, obviating the necessity forattention in use and accuracy in manufacturing and assemblin Furtherobjects, and objects relating to structural details, will definitelyappear from the detailed description to follow.

I accomplish the objects of my invention by the devices and meansdescribed in the following specification. The invention is clearlydefined and pointed out in the claims.

A structure which is a preferred embodiment of my invention is clearlyillustrated in the accompanying drawing, forming a part of thisspecification, in which:

Figure I is a detail view of a pitman structure embodying the featuresof my invention.

Fig. II is a side view of the structure appearing in Fig. I.

Fig. III is a detail longitudinal section on a line corresponding toline 33 of Figs. II and IV.

Fig. IV is adetail longitudinal section on a line corresponding to line4-4: of Figs. I and III.

Fig. V is a detail view of a slight. modification in the fori'n ofconnecting the pitman to its bearing.

Fig. VI is another modification in the feature of connecting the pitmanto its bearing. In the drawing similar reference characters refer tosimilar parts throughout the several views, and the sectional views aretaken looking in the direction of the little arrows at the ends of thesection lines.

Specification of Letters Batent.

Grand'Itapids, "county of Kent,-

. a structure, it being Referring to the drawing, 1 represents thedriving crank which, in practice, constitutes the axle for the drivingwheels in the embodiment shown in Letters Patent referred to.

2 represents an arm the structure illustrated.

The pitman 3 is formed of a flat bar of steel having its outer endformed into an eye 4t disposed between and secured to the driven member2 by the pin 5, the pin being headed or upset to retain it.

I provide a bearing comprising a pair of complemental members 6 havingopposed recesses 7 to receive the crank and opposed recesses 8 toreceive the end of the pitman.

The bearing members are secured to the pitman and in engagement with thecrank by the bolt 9 arranged through the bearing members and pitman,

which permits a limited swing or pivotal movement, so that the hearingmay aline itself on the crank to compensate or any such inaccuracies asare likely to occur in the manufacture of structures of this character.

In the modified construction shown in Fig. V the pitman 3 is formed of astrap folded upon itself with its ends lapped upon the 'outer sides ofthe bearing members, a bolt being arranged through both ends and throughthe bearing members securing the same effect as in Fig. III.

In the modification shown in Fig. VI the pitman 3 is formed as a loop 3at its inner end embracing bearing members 6 which are cylindrical ingeneral form. The loop embraces these bearing members loosely enough sothat they aline themselves therein.

The bearing members are perferably formed of wood and treated with hottallow or other lubricant material to provide a self-lubricatingbearing. This is particularly desirable in vacuum cleaners of the typedescribed, as the application of: lubricant is not desirable as it wouldcollect dust and thus cause undue wear of the bearing, and, further,excessive lubricant might be applied which would drip upon carpets, rugsor the like on which the cleaner was used.

My improved pitman is also of advantage in that it facilitates themanufacture and assembly of the parts.

Patented Ja n.'21, 1919. j

Application filed June 17, 1918. Serial No. 240,358.

on the bellows of such the driven member in by means of which the partsare secured together in a manner 1. The combination "of "a drivingcrank;a

driven member having spaced arms, a pitman formed of a fiat bar havlnglts outer end rolled into an eye Which is disposed between and securedto said arms by a pin -41 Thegcombination of a driving crank, a pitman,and a pair of complemental bearing members embracing". the, crank andtherethrough, and a pairofcomplemental 1 bearing members disposed onopposite sides of the innerend ofsaid pitman to embrace the crank andsecured tothe pitman by a single bolt arranged through thebearingmembers and 'pitmanyand permitting" the self-alinement of the parts, thebear-' ing members being formed of WOOd treated to render themself-lubricating.

2. The combination ofa driving crank,

driven member having spaced arms, a. pitman formed of a Hat barhaving"itsxouter eye which 1s d1sposed end rolled into .an between andsecured-to said arms by a pin therethrough, and a pair of 'complem'entalbearing members: disposed on opposite sides s of the inner end of saidpitman to-embrace the crank and secured to thepitman by single boltarranged through the bearing members and .pitman and permitting theself-alinement of the parts. i 3. The combination of a driving'crank, apitman formed of a flat bar, and a pair of complemental bearing membersdisposed on Copies of this'patent may be obtained for five cents each,by addressing the Commissioner of Patents.

opposite sides of the inner end of said pitman to embrace the crank andsecured to the pitman, by" a single through thebearing members andpitman and permitting the self-alinement of the parts, the bearingmembers being formed of Wood treated to render them self-lubri eating:

secured to thepitman by asingle bolt. ar-

ranged through the bearing members and pitman and permittingthe-self-alinement being-:6

of the-parts, the bearing members formed of Wood treated-to renderthem'. self lubricating;

5. The combination "of a driving: crank-Q a pitman, and a pair ofcomplementai-bean ing members. embracing the crank and securedtosaidpitman so that the partsa-re self-aiming, the bearing .members beingformed" of Wood" treated to render them' self lubricating.

In Witness 'WhereoflI have" hereuntoset my hand and sea 1- -in"thepresence'of two- Witnesses. s v

BERNARD JOHN BOUWMEESTER. as ,l

Witnesses-z IRA J. O EN, FRED C. LINDNER x Washnngton, D. 6."

bolt arranged

